Alert archive / Minnesota / Freeze Warnings in 2007

Freeze Warning 1, NWS Grand Forks, ND

September 14, 20074 counties in Minnesota

NWS Grand Forks, ND issued this freeze warning at Sep 14, 2007, 10:41 PM CDT for 4 counties in Minnesota. It took effect at Sep 15, 2007, 12:00 AM CDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 14, 2007, 10:41 PM CDT (03:41 UTC)
In effect from: Sep 15, 2007, 12:00 AM CDT
Expired: Sep 15, 2007, 9:00 AM CDT
In force: 9 hr
Issued by: NWS Grand Forks, ND

Counties Beltrami County, MN, Hubbard County, MN, Lake of the Woods County, MN, Wadena County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 180 km from the middle of the area, began a volume at 03:39 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Forks, ND wrote its last area forecast discussion before this freeze warning went out at Sep 14, 2:36 PM CDT, 8 hours 5 minutes earlier.

Area forecast discussion, Sep 14, 2:36 PM CDT, 8 hours 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND FORKS ND
236 PM CDT FRI SEP 14 2007

.SHORT TERM...MAIN CHALLENGE WILL BE FROST POTENTIAL TONIGHT. 12Z
MODELS INITIALIZED IN GOOD SHAPE...ALTHOUGH GFS DID BEST WITH
850MB TEMPS (NAM +2C TOO WARM). MODELS SIMILAR THROUGH THE PERIOD
WITH DIFFERENCES SMALL ENOUGH THAT A COMPROMISE CAN BE USED.

TONIGHT...WILL ISSUE FROST ADVISORY FOR ALL AREAS EAST OF THE RED
RIVER VALLEY TONIGHT. CLEAR SKIES WELL UPSTREAM...AND ANY CLOUD
COVER CURRENTLY OUT THERE WILL DISSIPATE THIS EVENING WITH LOSS OF
SOLAR. SFC RIDGE WILL PROPAGATE ACROSS THE FA THIS
EVENING...LOCATED JUST E OF THE FA BY 12Z SAT. 850MB TEMPS WILL
WARM 3C TO 5C FROM 00Z THROUGH 12Z SAT. MAIN CHALLENGE FOR FROST
POTENTIAL WILL BE HOW INCREASING SFC WINDS AND WARMING TEMPS ALOFT
COUNTERACT CLEAR SKIES (AND DRY AIRMASS WITH DEW POINTS 25F-30F).
WINDS E OF THE VALLEY SHOULD BE BELOW 5KTS THROUGH MOST OF THE
NIGHT...MAKING FROST LIKELY HERE. DO NOT THINK TEMPS WILL DIP
BELOW 28F WITH SFC WINDS INCREASING AROUND 12Z...BUT WILL NEED TO
MONITOR FOR POSSIBLE FREEZE WARNING. ALONG AND W OF THE
VALLEY...SFC WINDS WILL INCREASE ABOVE 5KTS AFT 06Z...AND THINK
THIS WILL BE ENOUGH TO PREVENT WIDESPREAD FROST WITH WARMING TEMPS
ALOFT (BUT WILL MENTION PATCHY FROST FOR ALL BUT DVL BASIN WITH
MIN TEMPS TO 34F POSSIBLE). DID SIDE WITH COOLER GFS GUIDANCE
CONSIDERING NAM INITIALIZING TOO WARM WITH 850MB TEMPS.

SAT-MON...UPPER LEVEL FLOW WILL BECOME SW BY MONDAY. SAT-SUN LOOK
TO BE DRY WITH MOSTLY CLEAR SKIES WITH REGION BETWEEN WX SYSTEMS.
850MB TEMPS WARM EACH DAY...WITH MAX/MIN TEMPS RESPONDING
LIKEWISE. MODELS HAVE REMAINED CONSISTENT WITH PRECIP ON MON...AND
INCREASED POPS SLIGHTLY.

.LONG TERM (TUE-THU)...LONG RANGE PATTERN OVERALL IN GOOD
AGREEMENT BETWEEN MODELS WITH WESTERN US MID LEVEL TROUGHING.
THIS WILL KEEP FAIRLY ACTIVE PATTERN THROUGH LONG RANGE PERIOD.
A BRIEF BREAK IN PCPN AS SYSTEM EARLY IN PERIOD LIFTS NE. NEXT
SURFACE LOW TO AFFECT FA LATER WEDNESDAY A LITTLE QUICKER THEN
PREVIOUS RUNS. WITH BOUNDARY LOOKING PARALLEL TO FLOW MAY TAKE
SOME TIME FOR FEATURE TO EXIT SO EXTENDED POPS THROUGH LATER HALF
OF PERIOD NECESSARY. THERMAL PROFILE SEASONABLY WARM HOWEVER
CLOUDS/PCPN MAY LIMIT TEMPERATURE RISES DURING DAY.

&&

.AVIATION...AS LOW LEVELS DRY WITH ADVANCING HIGH PRESSURE ANY
RESIDUAL MVFR CIGS WILL CONTINUE TO LIFT INTO VFR RANGE. WITH
CELLULAR NATURE OF CLOUDS SKIES WILL CLEAR FROM WEST TO EAST THIS
AFTERNOON/EVENING.

&&

.FGF WATCHES/WARNINGS/ADVISORIES...
ND...NONE.
MN...FROST ADVISORY FROM 2 AM TO 9 AM CDT SATURDAY FOR MNZ005-006-008-
     009-013>017-022>024-027-028-030>032-040.

&&

TG/VOELKER

Hazardous weather outlook, Sep 14, 3:09 PM CDT, 7 hours 32 minutes before

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Nearby

Freeze Warnings in Minnesota, 2007 Every freeze warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.